Slewmaster - CFA vs. VFA "Rumble"

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#3,361
thimios said:
CFA-X and "XH" (CFA , of course) - Similar to the "VSSA/peeceebee" , a very simple amp usable
with the "slew" OPS's. POST #701 -perfected (684 is an error - do NOT use ! )
Edit ... post #2739 is the official schema for the "new" version for CFA-X "H" (hawksford powered).
This second CFA-X"H" is what WE NAME MODIFIED because this was modified by BV in two versions.
Click to expand...
Thank's for information, tte amp very interesting for me, excuse my bad english
Iam a Swedish builder in many years of amplifier.
Regard Alcroner
 
#3,362
thimios said:
CFA-X and "XH" (CFA , of course) - Similar to the "VSSA/peeceebee" , a very simple amp usable
with the "slew" OPS's. POST #701 -perfected (684 is an error - do NOT use ! )
Edit ... post #2739 is the official schema for the "new" version for CFA-X "H" (hawksford powered).
This second CFA-X"H" is what WE NAME MODIFIED because this was modified by BV in two versions.
Click to expand...
Thank's Thimios and i will follow the amp construktion,very interesting.
Regard Alcroner
 
#3,364
Esperado said:
Bimo, don't you had a VSSA ?
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Yes, I have VSSA variant. First, I have VSSA like Peeceebee but with CCS, and I have VSSA input with Ostripper's EF3 output.

I want to compare the sound of VFA with high slew rate. I found the high frequency of my new VFA is not as clear as my VSSA variant, but the different is not huge. But on bass region, my new VFA is better. Overall, I like VSSA with Ostripper's EF3 :up:
 
#3,365
bimo said:
Yes, I have VSSA variant. First, I have VSSA like Peeceebee but with CCS, and I have VSSA input with Ostripper's EF3 output.

I want to compare the sound of VFA with high slew rate. I found the high frequency of my new VFA is not as clear as my VSSA variant, but the different is not huge. But on bass region, my new VFA is better. Overall, I like VSSA with Ostripper's EF3 :up:
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Hi Anistardi you must listen Gnome and Nad also.😱
Thimios.
 
#3,366
It seems we are starting to see some very different results between the listening tests as done by Terry and Thimios. We will need to look at the differences in test setup to understand why such contradictory results are being reported. I would also request for anyone who can do some accurate acoustic testing show the measured acoustic output differences from the speakers. I agree with Terry that levels must be matched accurately. I am very curious what the answers to this mystery will be.
 
#3,367
Lazy Cat said:
The whole mess in this thread, one say I could not hear any difference, one says this one is like this, others like that, one is looking to measurements only, one is calculating the sound ... I wonder what would be a consensus at the end?
As many people as many opinions. Whom to believe? Who's right?
I'd say KISS 😀
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Even after so many years, i am unable, most of the time, to reach a global conclusion about this or that.
Measurements gives an obvious answer, if they are very different, and help to dig in the good direction. But not always. I had bad amps with incredible low measured distortions.
Listening is the way, but it is difficult, we can be mistaken so often. Instant comparison don't work so well. Need listening in the long run, half listening.
And it depend so much of the sources and speakers.
By example, fast amps, with the best trebles, always give the feeling of "less treble". So we need to know exactly how to listen, too.
Often, the best amp is less "impressive", but less fatigue. The bad can have too much added "sharpness", like in photography.
KISS is a good way to minimize the risks to have details lost in the mazes.
At the end, the perfect amp is supposed to be as boring than real life ?
 
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#3,368
Esperado said:
Even after so many years, i am unable, most of the time, to reach a global conclusion about this or that.
Measurements gives an obvious answer, if they are very different, and help to dig in the good direction. But not always. I had bad amps with incredible low measured distortions.
Listening is the way, but it is difficult, we can be mistaken so often. Instant comparison don't work so well. Need listening in the long run, half listening.
And it depend so much of the sources and speakers.
By example, fast amps, with the best trebles, always give the feeling of "less treble". So we need to know exactly how to listen, too.
Often, the best amp is less "impressive", but less fatigue. The bad can have too much added "sharpness", like in photography.
KISS is a good way to minimize the risks to have details lost in the mazes.
At the end, the perfect amp is supposed to be as boring than real life ?
Click to expand...

Hi
I use always same source and same speakers and i listening same track or different track at the same point . I found differences between amps not big but there are differences.
Nikos
 
#3,369
Lazy Cat said:
The whole mess in this thread, one say I could not hear any difference, one says this one is like this, others like that, one is looking to measurements only, one is calculating the sound ... I wonder what would be a consensus at the end?
As many people as many opinions. Whom to believe? Who's right?
I'd say KISS 😀
Click to expand...

as long as we know they are opinions, who cares?
different amps will appeal to different folks....
 
#3,377
Opinions are just that. One person will say something sounds so great, like a real instrument and they have a tin ear or just haven't a clue. Specifications are just as questionable many times. A perfect example would be the early Crown DC300 amplifier. On paper it looks like a very good amplifier and in reality it sounded atrocious. Specs just tell you if something is really off, then you have to do your own listening tests or all of the subjective and objective opinion is just as useless as anything else.
 
#3,378
Christophe,
Funny how listening to Eric Clapton playing that song through that Marshall stack can sound so good, we do enjoy a distorted electric guitar sound don't we, but play that same tune back through that same Marshall stack and it would sound like hell! Definitely hard to use amplified electric guitar as a reference for sound quality. You and I know what is happening in those Marshall speakers and enjoy that, but don't use that to amplifier the playback or try and listen to an acoustic violin through that same equipment.
 
#3,379
Kindhornman said:
Opinions are just that. One person will say something sounds so great, like a real instrument and they have a tin ear or just haven't a clue.
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The next step for me is the inquiry after someone says it sounds more accurate to the real sound of an instrument....... listening credibility then has to be established.

but detailed comparative descriptions (eg before and after) of the sound being heard helps more than a "like" or 'dislike' statement.


THx-RNMarsh
 
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#3,380
Steven, of course. It was just to bring a smile on the Richard's face.
Behind, something about harmonic distortions witch can be agreeable, even with electric violins....
As long as there is not too much treble, and a unique instrument.
As you said no good for music *reproduction*: the reasons why we cannot play a mixage in a guitar amp are: the bandwidth limitation... and the IM.
 
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